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Print in friendly format Send this term to a friend  4L80E
Automatic Transmission - 4 Speed

1st Gear: 2.43
2nd Gear: 1.49
3rd Gear: 1.00
4th Gear: 0.75

Reverse: 2.07

- Used in production GM models...
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Re: What happens when you break a valve spring?

Subject: Re: What happens when you break a valve spring?
by NelsonV on 2008/8/1 4:22:27

Update 7-31-2008

Didn't get much done last couple weeks except actually making money to pay for my loot. I did do a little wrenching last week, but forgot my camera at my brother's house. So this update is a week late. Hope this will keep your appetites whetted.

Here I am tearing into the old rotating stock. OK, yes I am flexing for the camera:
Resized Image


I also did some suspension work. The adjustable, upper control arms were already run before on the car but failed.
Resized Image


The red sleeves are made out of 1" hex aluminum stock. I had some coilovers in the car and I pre-loaded them incorrectly, leading to failure of one coilover, as well as the hex aluminum (see below). So I made new adjusters for the control arms. New stock is 1-1/8" Chrome-Moly. I had them nickel plated because it was free. Also added some Cherry Red Krylon to the previously rusty cross-shafts.
(The acrylic blocks in the background are my sidework that are helping to fund the goodies.)
Resized Image

Next on my to-do list...
This weekend I intend to finish tearing down the short block so I can send it for boring and decking when the new rotating mass arrives (hopefully next week or so).
Also, planning to hang the suspension back onto the frame.

Lastly, after much hemming and hawing, I finally ordered the new rotating assembly last week. I got:
Callies Dragonslayer Crank with 4.25" stroke
Compstar H-beam rods
SRP Flat-top pistons
Everything forged. Combined with my 115cc combustion chambers in the RaceRite heads, I'm looking at 8.9:1. Very pump gas friendly. Force-feed friendly. Next week, I'll sharpen my pencil and finalize the grind with my camshaft vendor.

To be continued....
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